<template>
  <div>
    <!-- 头部部分 -->
    <header class="header">
      <h1>todos</h1>
      <input
        class="new-todo"
        placeholder="请输入任务名称"
        autofocus
        v-model.trim="values"
        @keyup.enter="add"
      />
    </header>
  </div>
</template>

<script>
export default {
  data() {
    return {
      values: "",
    };
  },
  methods: {
    add() {
      if (!this.values) {
        alert("填");
        return;
      }
      this.$emit("add", this.values);
      this.values = "";
    },
  },
};
</script>

<style>
</style>